Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1995-11-20
1996-09-10
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324523, 324537, G01R 3102, H01H 3102
Patent
active
055549284
ABSTRACT:
A method for detecting faults on a printed circuit board populated with semiconductor electronic components. To detect faults, signal pins on the components are taken in pairs. The an indication of the common mode resistance between those pins and ground is computed from a series of current measurements. An error is detected when the common mode resistance is outside of a predetermined range. A "learn mode" is also disclosed in which the pairs of leads used for the test are selected by taking measurements on a known good board without detailed knowledge of the semiconductor components on the board.
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Karlsen Ernest F.
Teradyne, Inc.
Walsh Edmund J.
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